EXAMPLE 1 Finding a Mean Geysers Over a span of 12 hours, Old Faithful Geyser in Yellowstone National Park erupted 10 times. The lengths (in minutes) of the eruptions are shown What is the average length of the eruptions?
EXAMPLE 1 To find the mean length in minutes of the eruptions of Old Faithful listed, divide the sum of the 10 lengths of time by 10. Mean = = = 3.7 The mean length of the eruptions is 3.7 minutes. ANSWER Finding a Mean
GUIDED PRACTICE for Example 1 Find the mean of the data. 1. 6, 13, 12, 18, 14, 4, 7, 19, 15 ANSWER , 1, 5, 14, 12, 5, 17, 13 ANSWER 9.625